public bool RunCompare(DatabaseSchema schema1, DatabaseSchema schema2)
{
var comparer = new CompareSchemas(schema1, schema2);
string txt;
try
{
txt = comparer.Execute();
}
catch (Exception exception)
{
Message =
@"An error occurred while creating the script.\n" + exception.Message;
return false;
}
if (string.IsNullOrEmpty(txt))
{
Message = "No differences found";
}
else
{
using (var scriptForm = new ScriptForm(txt))
{
scriptForm.ShowDialog();
}
}
return true;
}
public void WhenSecondSchemaIsEmptyThenEverythingIsDropped()
{
//arrange
var schema1 = TestHelper.GetNorthwindReader().ReadAll();
var schema2 = new DatabaseSchema(null, null);
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.AreNotEqual(string.Empty, script);
if (schema1.Tables.Any())
{
Assert.IsTrue(script.Contains("DROP TABLE"));
}
if (schema1.Views.Any())
{
Assert.IsTrue(script.Contains("DROP VIEW"));
}
if (schema1.StoredProcedures.Any())
{
Assert.IsTrue(script.Contains("DROP PROCEDURE"));
}
}
public void GivenIdenticalSchemas()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
DatabaseSchema schema2 = CreateSchema();
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.AreEqual(string.Empty, script);
}
public void GivenDroppedTable()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
schema1.Tables.Add(CreateProductsTable());
DatabaseSchema schema2 = CreateSchema();
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.IsTrue(script.Contains("DROP TABLE [Products]"));
}
public void GivenAddedColumn()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
var productsTable = CreateProductsTable();
schema1.Tables.Add(productsTable);
DatabaseSchema schema2 = CreateSchema();
var productsTable2 = CreateProductsTable();
schema2.Tables.Add(productsTable2);
var nameColumn = new DatabaseColumn { Name = "Name", DbDataType = "NVARCHAR", Length = 10, Nullable = false };
productsTable2.Columns.Add(nameColumn);
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.IsTrue(script.Contains("ADD [Name]"));
}
public void Given2DatabasesThenDifferencesFound()
{
//arrange
CreateDatabases();
//act
var dsr1 = new DatabaseReader("Data Source=" + Db1Sqlite + ";Version=3;", SqlType.SQLite);
var schema1 = dsr1.ReadAll();
var dsr2 = new DatabaseReader("Data Source=" + Db2Sqlite + ";Version=3;", SqlType.SQLite);
var schema2 = dsr2.ReadAll();
var comparison = new CompareSchemas(schema1, schema2);
var result = comparison.Execute();
//assert
//script should look like this...
//-- ADDED TABLE Products COLUMN Cost
//ALTER TABLE [Products] ADD [Cost] NUMERIC DEFAULT 0 NOT NULL;
//-- Products from [Name] TEXT NOT NULL to [Name] TEXT NULL
//-- TODO: change manually (no ALTER COLUMN)
Assert.IsTrue(result.Contains("ALTER TABLE [Products] ADD [Cost]"));
Assert.IsTrue(result.Contains("-- TODO: change manually (no ALTER COLUMN)"));
}
public void GivenDroppedUniqueConstraint()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
DatabaseConstraint constraint = GetUniqueConstraint();
schema1.Tables[0].AddConstraint(constraint);
DatabaseSchema schema2 = CreateSchema();
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.IsTrue(script.Contains("DROP CONSTRAINT [UK_NAME]"), script);
}
public void GivenUniqueConstraintWithChangedColumn()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
DatabaseConstraint constraint = GetUniqueConstraint();
schema1.Tables[0].AddConstraint(constraint);
DatabaseSchema schema2 = CreateSchema();
DatabaseConstraint constraint2 = GetUniqueConstraint();
constraint2.Columns[0] = "Desc";
schema2.Tables[0].AddConstraint(constraint2);
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.IsTrue(script.Contains("DROP CONSTRAINT [UK_NAME]"), script);
Assert.IsTrue(script.Contains("ADD CONSTRAINT [UK_NAME] UNIQUE"), script);
}
public void GivenSameUniqueConstraint()
{
//arrange
DatabaseSchema schema1 = CreateSchema();
DatabaseConstraint constraint = GetUniqueConstraint();
schema1.Tables[0].AddConstraint(constraint);
DatabaseSchema schema2 = CreateSchema();
DatabaseConstraint constraint2 = GetUniqueConstraint();
schema2.Tables[0].AddConstraint(constraint2);
//act
var comparison = new CompareSchemas(schema1, schema2);
var script = comparison.Execute();
//assert
Assert.AreEqual(string.Empty, script);
}